Jointed metal pipe.



I PATENTED NOV. '19

J. DUNKEL.

JOINTED METAL PIPE.

APPLICATION FILED MAY 25. 1907.

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J. DUNKEL.

JOINTED METAL PIPE- APPLICATION rum) MAY 25, 1907.

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PATENTED NOV. 19, 1907.

J. DUNKEL. JOINTED METAL PIPE. APPLICATION FILED MAY 25. 1907.

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JULIUS DUN KEL, OF LANGFUHR, NEAR DANZIG, GERMANY.

JOINTED METAL PIPE.

Specification of Letters Patent.

Patented Nov. 19, 1907.

Application filed May 25. 1907. Serial No. 375,734.

To all whom it may concern:

Be it known that I, JULIUS DUNKEL, a subject of the King of Prussia,residing at Langfuhr, near Danzig, Germany, have invented certain newand useful Improvements r in Jointed Metal Pipes, of which the followingisa specification.

The jointed pipes shown in the drawing are applicable for use asbrakeand heatingfluid pipes in railway working, and are designed toincrease the certainty of working.

The improved pipe consists of a number of pipe-members a joined togetherin a row and coupled by one or more glands I) with flanged rims c attheir ends. In order to obtain the required flexibility, one (preferablythe first) connection between the pipe members, which is placed next tothe end of the vehicle, has its axis arranged in a erpendicular positionrelatively to the p ane of the roadbed, in order that the pipe can adaptitself at this place to the motion of the vehicle when passmg roundcurves, or in the case where the brake pipes are connected togethercross-wise between the vehicles, while two further connections betweenpipe-members have their axes horizontal and parallel to the plane of therails, in order to provide the necessary flexibility for connecting twosuch pipes in coupling carriages and also in the up and down motion ofthe vehicles during working. There is moreover no difficulty inincreasing the number of joints in each brake-pipe, yet the provision ofthree joints in each brake pipe is usually sufficient for working.

Figures 1 and 2 of the drawing respectively show half of a heating pipeconnection and a brake-pipe closed by a coupling head. Figs. 3 to 7 ofthe drawing illustrate various forms of construction of the joint, whichwork in a quite similar manner.

The simpler forms are designed to reduce the cost of maintenance of suchpipes as much as possible, and thoroughly secure the flexibilitythereof. It is left to purchasers themselves to choose the arrangementof joints required for each particular case. It is essential, by reasonof the said arrangement, that on the first movable member of the pipearranged next to the vehicle, the axes of the joints at the two endsthereof be put at right angles to each other, that moreover the firstgland b for connecting the pipemembers to the fixed pipe on the vehicleshall lie in the longitudinal axis of this first member of thebrake-pipe, tlie other glands fixed pipe.

In Figs. 3 to 7, the several modifications of the joints are showndiIIerentIy according to their use. The forms of construction in Figs. 4to 5 are only designed for joints which are horizontal or parallel tothe plane of the road-bed. The forms of construction in Figs. 6 and 7are applicable only for joints perpendicular to the plane of the rail.In the form of construction shown in Fig. 3, a multiple gland joint,which requires two packing rings, is employed. Differing from this, ajoint is shown in Figs. 4 to 7 for connecting the ipe members a by meansof single glands%, which only require one packing ring. In this form ofconstruction, the single gland b employed is rigidly connected byscrew-threads or other auxiliary means with one pipe-member a, while theother pipe-member a abutting against the same turns about this singlegland b in the same manner as in the construction shown in Fig. 3 andcan move in the longitudinal direction of the gland. It is unimportantwhether the single gland I) has its cylindrical part screwed to theinside of the cylindrical part of the pipe-member a connected therewith,as shown in Fig. 4, or to the outside, as shown in Figs. 5 to 7. Onlythe conditions of the particular purpose in view can decide whether oneor the other form of construction is to be used. As a security againstloosening of these screw threaded joints between the single glands andthe pipe-members screwed thereto, and also against se aration of theglands b in Fig. 3 compose of several arts, locking screws f areemployed.

In orc or to pack the joints or connections, elastic packings d areused, which are tightly compressed between the rims or edges of thesuitably shaped tube-members a and of the flanges c on the glands I)only during the use of the pi e or brake-tube when it is filled withfluid under pressure.

In order to stiffen the glands a thickened gland-ring e is arrangedbetween the two packing-rings d, this gland-ring thus forming a shortpipe-member. When not in use, the connection between the pipemembers aand the glands c is quite loose and can. be moved very easily, as isnecessary for the manipulation of the pipe when preparing for work. Thejoints in this time of preparation are not fluid-tight and are onlyhowever lie at right angles to the axis of the at the joints,

closed air-tight on entrance of the working fluid. In order to insurethis condition under all circumstances, the pressure-rims on thepipe-members a are arranged so that they can be easily turned and movedlongitudinally on the glands, and there is moreover a space between eachtwo pipe-members so connected. By this means, friction of the partsagainst each other which would otherwise be expected and which wouldultimately destroy the flexibility, is preeluded. By reason of thisarrangement, the couplings present a wide range of flexibility, such ascan not be obtained even by the india-rubber pipes at present in use.

By this arrangement, the durability of brakeor heatingpipes of this kindis rendered almost unlimited and is limited solely by the wear of theelastic packings.

I prefer that the complemental grooves in a pipe member and gland becircular in cross-section and that the packing ring which screw fits thesame be also circular and of the same radius as those of the grooves, asshown in the various figures of the drawings.

What I claim is An adjustable connection for train pipes and the likeembodying a pipe member, and

a gland removably fitted in said pipe member and capable of relativerotary and axial movements, and provided with transversely curvedcomplemental grooves, and a packing ring circular in cross sectionadapted to be I compressed between and centered by the said grooves whensaid pipe member and gland are moved axially by fluid pressure in saidpipe member.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JULIUS DUNKEL. Witnesses:

G. SPUMSKI, FRITZ FREUDEWENT.

